Support raygui as standalone library

src/raygui.c

@@ -5,13 +5,6 @@
 *   Initial design by Kevin Gato and Daniel Nicolás
 *   Reviewed by Albert Martos, Ian Eito, Sergio Martinez and Ramon Santamaria (@raysan5)
 *
-*   The following functions from raylib are required for drawing and input reading:
-        GetColor(), GetHexValue() --> Used on SetStyleProperty()
-        MeasureText(), GetDefaultFont()
-        DrawRectangleRec(), DrawRectangle(), DrawText(), DrawLine()
-        GetMousePosition(), (), IsMouseButtonDown(), IsMouseButtonReleased()
-        'FormatText(), IsKeyDown(), 'IsMouseButtonUp()
-*
 *   This software is provided "as-is", without any express or implied warranty. In no event
 *   will the authors be held liable for any damages arising from the use of this software.
 *
@@ -29,25 +22,30 @@
 *
 **********************************************************************************************/
 
-#define RAYGUI_STANDALONE     // NOTE: To use the raygui module as standalone lib, just uncomment this line
+//#define RAYGUI_STANDALONE     // To use the raygui module as standalone lib, just uncomment this line
                               // NOTE: Some external funtions are required for drawing and input management
 
-#if defined(RAYGUI_STANDALONE)
-    #include "raygui.h"
-#else
+#if !defined(RAYGUI_STANDALONE)
     #include "raylib.h"
 #endif
 
+#include "raygui.h"
+
 #include <stdio.h>      // Required for: FILE, fopen(), fclose(), fprintf(), feof(), fscanf()
                         // NOTE: Those functions are only used in SaveGuiStyle() and LoadGuiStyle()
                         
 #include <stdlib.h>     // Required for: malloc(), free()
 #include <string.h>     // Required for: strcmp()
+#include <stdarg.h>     // Required for: va_list, va_start(), vfprintf(), va_end()
 
 //----------------------------------------------------------------------------------
 // Defines and Macros
 //----------------------------------------------------------------------------------
-//...
+#if defined(RAYGUI_STANDALONE)
+    #define KEY_LEFT            263
+    #define KEY_RIGHT           262
+    #define MOUSE_LEFT_BUTTON     0
+#endif
 
 //----------------------------------------------------------------------------------
 // Types and Structures Definition
@@ -65,7 +63,7 @@ typedef enum { SLIDER_DEFAULT, SLIDER_HOVER, SLIDER_ACTIVE } SliderState;
 // Global Variables Definition
 //----------------------------------------------------------------------------------
 
-//Current GUI style (default light)
+// Current GUI style (default light)
 static int style[NUM_PROPERTIES] = {
     0xf5f5f5ff,         // GLOBAL_BASE_COLOR,
     0xf5f5f5ff,         // GLOBAL_BORDER_COLOR,
@@ -176,15 +174,24 @@ static Color ColorMultiply(Color baseColor, float value);
 static Color GetColor(int hexValue);   // Returns a Color struct from hexadecimal value
 static int GetHexValue(Color color);   // Returns hexadecimal value for a Color
 static bool CheckCollisionPointRec(Vector2 point, Rectangle rec);  // Check if point is inside rectangle
+static const char *FormatText(const char *text, ...);   // Formatting of text with variables to 'embed'
 
 // NOTE: raygui depend on some raylib input and drawing functions
-// TODO: Set your own input functions (used in ProcessCamera())
+// TODO: Set your own functions
 static Vector2 GetMousePosition() { return (Vector2){ 0.0f, 0.0f }; }
 static int IsMouseButtonDown(int button) { return 0; }
 static int IsMouseButtonPressed(int button) { return 0; }
 static int IsMouseButtonReleased(int button) { return 0; }
 static int IsMouseButtonUp(int button) { return 0; }
-static int IsKeyDown(int key) { return 0; }
+
+static int GetKeyPressed(void) { return 0; }    // NOTE: Only used by GuiTextBox()
+static int IsKeyDown(int key) { return 0; }     // NOTE: Only used by GuiSpinner()
+
+static int MeasureText(const char *text, int fontSize) { return 0; }
+static void DrawText(const char *text, int posX, int posY, int fontSize, Color color) { }
+static void DrawRectangleRec(Rectangle rec, Color color) { }
+static void DrawRectangle(int posX, int posY, int width, int height, Color color) { DrawRectangleRec((Rectangle){ posX, posY, width, height }, color); }
+
 #endif
 
 //----------------------------------------------------------------------------------
@@ -194,6 +201,8 @@ static int IsKeyDown(int key) { return 0; }
 // Label element, show text
 void GuiLabel(Rectangle bounds, const char *text)
 {
+    #define BLANK (Color){ 0, 0, 0, 0 } // Blank (Transparent)
+
     GuiLabelEx(bounds, text, GetColor(style[LABEL_TEXT_COLOR]), BLANK, BLANK);
 }
 
@@ -203,7 +212,7 @@ void GuiLabelEx(Rectangle bounds, const char *text, Color textColor, Color borde
     // Update control
     //--------------------------------------------------------------------
     int textWidth = MeasureText(text, style[GLOBAL_TEXT_FONTSIZE]);
-    int textHeight = GetDefaultFont().size;
+    int textHeight = style[GLOBAL_TEXT_FONTSIZE];
 
     if (bounds.width < textWidth) bounds.width = textWidth + style[LABEL_TEXT_PADDING];
     if (bounds.height < textHeight) bounds.height = textHeight + style[LABEL_TEXT_PADDING]/2;
@@ -224,7 +233,7 @@ bool GuiButton(Rectangle bounds, const char *text)
     Vector2 mousePoint = GetMousePosition();
     
     int textWidth = MeasureText(text, style[GLOBAL_TEXT_FONTSIZE]);
-    int textHeight = GetDefaultFont().size;
+    int textHeight = style[GLOBAL_TEXT_FONTSIZE];
     
     // Update control
     //--------------------------------------------------------------------
@@ -282,7 +291,7 @@ bool GuiToggleButton(Rectangle bounds, const char *text, bool toggle)
     Vector2 mousePoint = GetMousePosition();
     
     int textWidth = MeasureText(text, style[GLOBAL_TEXT_FONTSIZE]);
-    int textHeight = GetDefaultFont().size;
+    int textHeight = style[GLOBAL_TEXT_FONTSIZE];
     
     // Update control
     //--------------------------------------------------------------------   
@@ -367,7 +376,7 @@ int GuiComboBox(Rectangle bounds, int comboNum, char **comboText, int comboActiv
     Rectangle click = { bounds.x + bounds.width + style[COMBOBOX_PADDING], bounds.y, style[COMBOBOX_BUTTON_WIDTH], style[COMBOBOX_BUTTON_HEIGHT] };
     Vector2 mousePoint = GetMousePosition();
 
-    int textHeight = GetDefaultFont().size;
+    int textHeight = style[GLOBAL_TEXT_FONTSIZE];
      
     for (int i = 0; i < comboNum; i++)
     {
@@ -657,9 +666,8 @@ int GuiSpinner(Rectangle bounds, int value, int minValue, int maxValue)
     Rectangle rightButtonBound = { bounds.x + bounds.width - bounds.width/4 + 1, bounds.y, bounds.width/4, bounds.height };
     Vector2 mousePoint = GetMousePosition();
 
-    int textHeight = GetDefaultFont().size;
-
     int textWidth = MeasureText(FormatText("%i", value), style[GLOBAL_TEXT_FONTSIZE]);
+    int textHeight = style[GLOBAL_TEXT_FONTSIZE];
     
     int buttonSide = 0;
     
@@ -894,10 +902,11 @@ char *GuiTextBox(Rectangle bounds, char *text)
         
         DrawText(FormatText("%c", text[i]), initPos, bounds.y + style[TEXTBOX_TEXT_FONTSIZE], style[TEXTBOX_TEXT_FONTSIZE], GetColor(style[TEXTBOX_TEXT_COLOR]));
         
-        initPos += ((GetDefaultFont().charRecs[(int)text[i] - 32].width + 2));
+        initPos += (MeasureText(FormatText("%c", text[i]), style[GLOBAL_TEXT_FONTSIZE]) + 2);
+        //initPos += ((GetDefaultFont().charRecs[(int)text[i] - 32].width + 2));
     }
 
-    if ((framesCounter/20)%2 && CheckCollisionPointRec(mousePoint, bounds)) DrawLine(initPos + 2, bounds.y + 5, initPos + 2, bounds.y + 10 + 15, GetColor(style[TEXTBOX_LINE_COLOR]));
+    if ((framesCounter/20)%2 && CheckCollisionPointRec(mousePoint, bounds)) DrawRectangle(initPos + 2, bounds.y + 5, 1, 20, GetColor(style[TEXTBOX_LINE_COLOR]));
     //--------------------------------------------------------------------    
 
     return text;
@@ -1116,6 +1125,8 @@ static bool CheckCollisionPointRec(Vector2 point, Rectangle rec)
 // Formatting of text with variables to 'embed'
 static const char *FormatText(const char *text, ...)
 {
+    #define MAX_FORMATTEXT_LENGTH   64
+    
     static char buffer[MAX_FORMATTEXT_LENGTH];
 
     va_list args;

src/raygui.h

@@ -30,46 +30,40 @@
 //----------------------------------------------------------------------------------
 #define NUM_PROPERTIES       98
 
-#define BLANK              (Color){ 0, 0, 0, 0 }           // Blank (Transparent)
-
-#define KEY_LEFT            263
-#define KEY_RIGHT           262
-
-#define MOUSE_LEFT_BUTTON     0
-
-
 //----------------------------------------------------------------------------------
 // Types and Structures Definition
 // NOTE: Some types are required for RAYGUI_STANDALONE usage
 //----------------------------------------------------------------------------------
-#ifndef __cplusplus
-// Boolean type
-    #ifndef true
-        typedef enum { false, true } bool;
+#if defined(RAYGUI_STANDALONE)
+    #ifndef __cplusplus
+    // Boolean type
+        #ifndef true
+            typedef enum { false, true } bool;
+        #endif
     #endif
-#endif
 
-// Vector2 type
-typedef struct Vector2 {
-    float x;
-    float y;
-} Vector2;
+    // Vector2 type
+    typedef struct Vector2 {
+        float x;
+        float y;
+    } Vector2;
 
-// Color type, RGBA (32bit)
-typedef struct Color {
-    unsigned char r;
-    unsigned char g;
-    unsigned char b;
-    unsigned char a;
-} Color;
+    // Color type, RGBA (32bit)
+    typedef struct Color {
+        unsigned char r;
+        unsigned char g;
+        unsigned char b;
+        unsigned char a;
+    } Color;
 
-// Rectangle type
-typedef struct Rectangle {
-    int x;
-    int y;
-    int width;
-    int height;
-} Rectangle;
+    // Rectangle type
+    typedef struct Rectangle {
+        int x;
+        int y;
+        int width;
+        int height;
+    } Rectangle;
+#endif
 
 // Gui properties enumeration
 typedef enum GuiProperty {